Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of THURSDAY: MARCH 30 , 2023
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Median Median Current Median Med
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WYOMING
SNAKE RIVER
Base Camp 7060 18.1 16.3 111 19.5 19.6 99
Blind Bull Sum 8650 24.7 23.6 105 16.8 17.4 97
Cottonwood Creek 7670 24.2 21.3 114 -M 24.3 *
East Rim Divide 7930 12.0 10.3 117 11.5 10.8 106
Grand Targhee 9260 43.6 39.8 110 22.8 29.4 78
Granite Creek 6770 18.4 15.6 118 15.3 17.2 89
Grassy Lake 7265 33.9 31.4 108 37.2 33.4 111
Gros Ventre Summit 8750 12.0 12.4 97 10.9 11.8 92
Gunsight Pass 9820 13.5 12.6 107 12.7 13.2 96
Lewis Lake Divide 7850 35.4 29.8 119 30.7 31.8 97
Loomis Park 8240 16.0 15.3 105 16.0 16.4 98
Phillips Bench 8200 29.0 25.9 112 -M 26.1 *
Salt River Summit 7640 19.1 13.4 143 18.1 15.2 119
Snake River Station 6920 19.8 16.5 120 21.9 21.3 103
Somsen Ranch 6800 19.4 11.6 167 20.8 16.3 128
Spring Creek Divide 9000 26.0 24.0 108 19.0 22.9 83
Thumb Divide 7980 20.0 15.6 128 18.4 16.8 110
Togwotee Pass 9580 21.9 22.8 96 20.2 24.0 84
Triple Peak 8500 23.6 22.4 105 24.0 24.4 98
Two Ocean Plateau 9240 30.1 28.0 108 21.1 25.2 84
Willow Creek 8080 35.6 29.0 123 33.9 31.7 107
Younts Peak 8350 16.0 14.2 113 13.0 14.2 92
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Basin Index (%) 113 98
MADISON HEADWATERS IN WYOMING
Black Bear 8170 44.0 36.8 120 40.6 35.0 116
Canyon 7870 14.4 -M * 16.6 -M *
Madison Plateau 7750 29.4 21.6 136 28.0 23.4 120
West Yellowstone 6700 16.6 10.3 161 18.8 13.6 138
Whiskey Creek 6800 20.8 15.0 139 25.3 19.1 132
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Basin Index (%) 132 124
YELLOWSTONE HEADWATERS IN WYOMING
Beartooth Lake 9360 18.5 21.0 88 17.2 19.3 89
Canyon 7870 14.4 -M * 16.6 -M *
Evening Star 9200 25.8 24.2 107 27.4 26.8 102
Fisher Creek 9100 33.3 31.2 107 33.9 31.4 108
Monument Peak 8850 21.7 19.4 112 24.0 20.4 118
Northeast Entrance 7350 10.1 9.6 105 12.2 12.4 98
Parker Peak 9400 23.6 20.1 117 22.8 19.2 119
Sylvan Lake 8420 20.1 19.0 106 22.9 21.8 105
Thumb Divide 7980 20.0 15.6 128 18.4 16.8 110
Two Ocean Plateau 9240 30.1 28.0 108 21.1 25.2 84
White Mill 8700 24.1 23.1 104 22.8 21.8 105
Wolverine 7650 13.5 10.9 124 12.6 11.8 107
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Basin Index (%) 108 104
WIND RIVER
Burroughs Creek 8750 10.8 -M * 10.4 -M *
Castle Creek 8400 6.4 6.7 96 7.0 8.2 85
Cold Springs 9630 7.7 7.2 107 9.1 8.8 103
Deer Park 9700 22.8 13.9 164 23.0 16.9 136
Hobbs Park 10100 14.8 13.6 109 13.9 12.6 110
Kirwin 9550 9.9 10.0 99 12.0 11.4 105
Little Warm 9370 10.3 10.0 103 11.8 11.4 104
South Pass 9040 18.2 14.2 128 17.9 14.7 122
St. Lawrence Alt 8620 7.3 -M * 9.4 -M *
Togwotee Pass 9580 21.9 22.8 96 20.2 24.0 84
Townsend Creek 8700 10.9 8.8 124 12.0 10.2 118
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Basin Index (%) 115 107
BIGHORN BASIN
Bald Mtn. 9380 17.9 18.2 98 14.7 15.4 95
Bear Trap Meadow 8200 9.1 6.0 152 9.2 7.6 121
Bone Springs Div 9350 14.8 16.0 92 11.8 14.6 81
Grave Springs 8550 9.8 8.0 122 10.1 8.8 115
Kirwin 9550 9.9 10.0 99 12.0 11.4 105
Marquette 8760 8.3 6.8 122 9.0 8.4 107
Middle Powder 7760 11.2 10.2 110 9.4 9.2 102
Owl Creek 8975 7.4 5.2 142 8.0 5.8 138
Powder River Pass 9480 10.9 10.6 103 13.2 11.9 111
Shell Creek 9580 13.6 14.6 93 13.7 13.2 104
Timber Creek 7950 6.0 4.4 136 6.7 7.6 88
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Basin Index (%) 108 103
SHOSHONE RIVER
Blackwater 9780 20.3 21.7 94 20.5 20.6 100
Evening Star 9200 25.8 24.2 107 27.4 26.8 102
Marquette 8760 8.3 6.8 122 9.0 8.4 107
Sylvan Lake 8420 20.1 19.0 106 22.9 21.8 105
Sylvan Road 7120 11.0 10.9 101 14.4 15.6 92
Younts Peak 8350 16.0 14.2 113 13.0 14.2 92
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Basin Index (%) 105 100
POWDER RIVER
Bear Trap Meadow 8200 9.1 6.0 152 9.2 7.6 121
Cloud Peak Reservoir 9860 14.2 14.1 101 13.8 12.6 110
Grave Springs 8550 9.8 8.0 122 10.1 8.8 115
Hansen Sawmill 8360 8.5 6.4 133 8.6 7.9 109
Middle Powder 7760 11.2 10.2 110 9.4 9.2 102
Powder River Pass 9480 10.9 10.6 103 13.2 11.9 111
Soldier Park 8720 8.8 6.9 128 8.2 8.6 95
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Basin Index (%) 117 109
TONGUE RIVER
Big Goose 7990 9.7 8.1 120 10.2 9.3 110
Bone Springs Div 9350 14.8 16.0 92 11.8 14.6 81
Burgess Junction 7880 12.1 9.8 123 13.4 10.8 124
Dome Lake 8880 11.1 11.2 99 11.3 12.0 94
Little Goose 8870 10.9 9.0 121 11.5 11.2 103
Sucker Creek 8880 13.5 11.4 118 15.9 12.8 124
Tie Creek 6870 9.1 5.0 182 12.3 9.9 124
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Basin Index (%) 115 107
BELLE FOURCHE
Blind Park 6890 9.1 7.0 130 10.7 10.4 103
Cole Canyon 5910 8.4 5.1 165 9.7 8.3 117
North Rapid Creek 6130 7.8 6.6 118 8.3 8.4 99
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Basin Index (%) 135 106
CHEYENNE RIVER BASIN
Blind Park 6890 9.1 7.0 130 10.7 10.4 103
North Rapid Creek 6130 7.8 6.6 118 8.3 8.4 99
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Basin Index (%) 124 101
UPPER N. PLATTE
Arapaho Ridge 10976 24.9 20.6 121 23.7 20.8 114
Blackhall Mtn 9839 37.3 29.2 128 36.0 28.1 128
Cinnabar Park 9707 -M 19.5 * 22.4 22.5 100
Columbine 9167 29.2 21.9 133 25.6 23.1 111
Divide Peak 8730 28.0 18.6 151 27.9 20.7 135
Joe Wright 10158 24.7 19.6 126 26.1 24.8 105
Laprele Creek 8390 11.6 9.2 126 12.0 11.2 107
Med Bow 10512 38.6 -M * 31.2 -M *
Never Summer 10323 24.9 19.4 128 17.8 16.2 110
North French Creek 10153 29.9 27.0 111 28.4 25.4 112
Old Battle 9860 40.2 28.9 139 31.2 31.5 99
Rawah 9069 15.2 10.5 145 16.4 14.6 112
Sage Creek Basin 7850 25.6 12.5 205 20.3 12.3 165
Sand Lake 10098 27.6 25.6 108 26.2 23.6 111
South Brush Creek 8495 15.7 11.5 137 14.2 13.0 109
Tower 10620 49.8 41.8 119 -M 38.0 *
Webber Springs 9260 29.3 21.2 138 30.9 24.4 127
Whiskey Park 9020 39.1 25.4 154 34.2 26.2 131
Willow Creek Pass 9523 17.4 12.4 140 16.9 13.0 130
Zirkel 9338 32.4 27.3 119 33.4 29.6 113
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Basin Index (%) 131 116
SWEETWATER
Deer Park 9700 22.8 13.9 164 23.0 16.9 136
Larsen Creek 9000 11.6 10.5 110 14.0 12.7 110
South Pass 9040 18.2 14.2 128 17.9 14.7 122
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Basin Index (%) 136 124
LOWER N. PLATTE
Casper Mtn. 7920 12.9 12.6 102 12.6 12.8 98
Laprele Creek 8390 11.6 9.2 126 12.0 11.2 107
Reno Hill 8430 14.4 13.2 109 15.4 14.2 108
Windy Peak 7915 10.8 7.9 137 11.3 9.4 120
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Basin Index (%) 116 108
LARAMIE RIVER
Brooklyn Lake 10250 24.4 20.2 121 24.2 20.8 116
Cinnabar Park 9707 -M 19.5 * 22.4 22.5 100
Crow Creek 8335 5.5 5.8 95 8.6 10.1 85
Deadman Hill 10239 18.8 15.8 119 17.4 16.8 104
Rawah 9069 15.2 10.5 145 16.4 14.6 112
Roach 9740 18.2 15.0 121 20.3 18.1 112
Windy Peak 7915 10.8 7.9 137 11.3 9.4 120
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Basin Index (%) 124 107
S. PLATTE
Crow Creek 8335 5.5 5.8 95 8.6 10.1 85
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Basin Index (%) 95 85
LITTLE SNAKE RIVER
Battle Mountain 7498 18.1 11.1 163 21.7 14.3 152
Divide Peak 8730 28.0 18.6 151 27.9 20.7 135
Elk River 8739 29.0 17.6 165 26.6 17.8 149
Elkhead Divide 8800 32.5 -M * 26.9 -M *
Little Snake River 8928 38.5 25.2 153 37.4 30.6 122
Old Battle 9860 40.2 28.9 139 31.2 31.5 99
Sage Creek Basin 7850 25.6 12.5 205 20.3 12.3 165
Sandstone RS 8152 -M 12.4 * 24.6 17.2 143
Whiskey Park 9020 39.1 25.4 154 34.2 26.2 131
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Basin Index (%) 157 131
UPPER GREEN RIVER
Big Sandy Opening 9080 14.8 12.8 116 14.8 12.1 122
Blind Bull Sum 8650 24.7 23.6 105 16.8 17.4 97
East Rim Divide 7930 12.0 10.3 117 11.5 10.8 106
Elkhart Park G.S. 9400 12.1 12.3 98 11.2 12.4 90
Gros Ventre Summit 8750 12.0 12.4 97 10.9 11.8 92
Gunsight Pass 9820 13.5 12.6 107 12.7 13.2 96
Indian Creek 9425 26.9 22.6 119 22.6 19.2 118
Kendall R.S. 7740 12.6 11.3 112 12.5 13.0 96
Larsen Creek 9000 11.6 10.5 110 14.0 12.7 110
Loomis Park 8240 16.0 15.3 105 16.0 16.4 98
New Fork Lake 8340 11.0 10.4 106 -M 10.4 *
Pocket Creek 9360 -M -M * -M -M *
Snider Basin 8060 14.3 12.4 115 14.8 13.5 110
Spring Creek Divide 9000 26.0 24.0 108 19.0 22.9 83
Triple Peak 8500 23.6 22.4 105 24.0 24.4 98
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Basin Index (%) 109 101
LOWER GREEN RIVER
Blacks Fork Jct 8869 12.9 8.6 150 13.6 11.8 115
Buck Pasture 9632 19.7 -M * 20.2 -M *
EF Blacks Fork GS 9360 13.8 11.3 122 11.0 10.3 107
Hams Fork 7840 15.2 10.7 142 13.6 10.8 126
Henrys Fork 10182 -M -M * 13.8 -M *
Hewinta 9500 12.9 10.4 124 15.1 12.5 121
Hickerson Park 9122 10.1 7.4 136 10.6 9.6 110
Hole-in-Rock 9168 9.1 6.7 136 10.3 9.4 110
Indian Creek 9425 26.9 22.6 119 22.6 19.2 118
Kelley R.S. 8180 19.9 14.6 136 20.2 15.6 129
Spirit Lk 10235 20.0 11.8 169 18.7 15.9 118
Steel Creek Park 10158 18.6 13.8 135 18.3 15.3 120
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Basin Index (%) 135 118
UPPER BEAR RIVER
Bear River RS 8777 13.9 9.0 154 15.0 11.4 132
Bug Lake 7987 28.1 18.2 154 22.8 17.2 133
Burts Miller Ranch 8000 10.1 5.3 191 13.4 7.1 189
Chalk Creek #1 9171 31.6 22.0 144 29.5 22.0 134
Giveout 6930 15.3 8.1 189 15.0 11.4 132
Hayden Fork 9130 22.8 14.4 158 26.3 19.4 136
Kelley R.S. 8180 19.9 14.6 136 20.2 15.6 129
Lily Lake 9133 15.5 12.1 128 16.5 14.3 115
Monte Cristo 8932 39.4 25.8 153 -M 24.6 *
Salt River Summit 7640 19.1 13.4 143 18.1 15.2 119
Spring Creek Divide 9000 26.0 24.0 108 19.0 22.9 83
Trial Lake 9992 35.2 21.4 164 33.4 21.2 158
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Basin Index (%) 147 129
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Median (or Average) Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median (or Average) represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median (or Average) value for those sites on this day.
The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Median (or Average) value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1991-2020.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median or average for the day is less than 10% of the maximum
median or average value for the year.
* Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians or averages and the resulting fraction
multiplied by 100.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.
